没有特别好的方法可以做到这一点。你***的选择是你必须是UINavigationBar的子类，并覆盖 layoutSubviews 来调用 [super layoutSubviews] 然后找到并重新定位按钮的视图。

There is no particularly good way to do this. Your best bet if you really must is to subclass UINavigationBar, and override layoutSubviews to call [super layoutSubviews] and then find and reposition the button's view.